Ars Technica posted a review on the Dell XPS 13 Developer Edition Linux Ultrabook

Dell's substantial investment in making a functional Linux Ultrabook pays off.

In an effort originally known as Project Sputnik, Dell dedicated resources into doing Linux on an Ultrabook "right"—writing code where necessary (and contributing that code back upstream like a good FOSS citizen) and paying attention to the entire user experience rather than merely working on components in a vacuum. The result is a perfectly functional Ultrabook with a few extra tools—that "Developer Edition" moniker isn't just for show, and Dell has added some devops spices into the mix with this laptop that should quicken any developer's heartbeat.

  It just works: Dell XPS 13 Developer Edition Linux Ultrabook review